matlab 读取文件（mat）存储为json文件

fid= fopen('reqJosn.json', 'w+');
load('request-set-10.mat');
requests = requests.request;
requestNum = length(requests);
for i = :
    request.name = sprintf('%s%d', 'vn_test_',i);
    request.type = ;
    request.description = sprintf('%s%d%s', 'virtual network ',i, ' for test use');
    controller.id = i;
    controller.name = 'defaultController';
    controller.host = 'localhost';
    controller.port = ;
    controller.type = 'POX';
    request.controller = controller;
    nodeNum = requests(,i).node_num;
    linkNum = requests(,i).link_num;
    request.sw_number = nodeNum;
    switches = {};//注意此处如需在结构里嵌套结构，必须这样子
    for j = :nodeNum
       swTemp.id = j;
       swTemp.name = sprintf('%s%d', 'sw', j);
       swTemp.resource = requests(,i).cpu(j);
       swTemp.port_num = ;
       swTemp.host_num = ;
       switches = [switches,swTemp];
    end
    request.switches = switches;
    subJson = savejson('',request);//幻化为json字符串，具体help一下
    fprintf(fid, '%s',subJson);
end
fclose(fid);